Excavating-bucket



W. M. VENABLE.

EXCAVATING BUCKET.

APPLICATION FILED OCT. 19, ms.

Patented Jul 20, 1920.

4 SHEETS-SHEET l.

W. M. VENABLE.

EXCA'VATING BUCKET.

APPLICATION FILED OCT. 19. I918.

Patented July 20, 1920.

4 SHEETSSHEET 2.

Fuzz

MW nwmww F'IB.E.

- I WITNESSES INVENTOR W. M. VENABLE.

EXCAVATING BUCKET.

APPLICATION FILED OCT. 19, 1918.

Patented July 20, 1920.

4 SHEETS-SHEET 3.

645mm m W. M. VENABLE.

EXCAVATING BUCKET.

APPLICATION FILED OCT. 19. I9I8- 1,346,999, Patented July 20, 1920.

4 SHEE? SSHEEI 4.

XIII r23 WITNESSES mm fi m.

" UNITED STATES PATENTTOFFICE.

WILLIAM- M. VENAIBLE, on PITTSBURGH, PENNsYLvA vIA, ASSIGNOR To BLAW-KNOX COMPANY, A CORPORATION on NEW JERSEY.

nxcnvnrmerncxnr.

To all whom it may concern:

Be it known that 1, WILLIAM VENABLE, a citizen of the United States, residing at Pittsburgh, in the county of Allegheny and State of Pennsylvania, have invented certain new and useful Improvements in Excavating-Buckets, of which the following is' a specification.

My invention relates to improvements in excavating buckets; and has for its primary objects to improve the construction and increase the efficiency, utility and durability of apparatus of this type; the provision of a bucket head structure in which is combined the characteristics of maximum rigidity and cheapness in its construction, and

wherein guards are provided for the bucket lines so that the latter cannot become displaced or grind against the head when the bucket is not hanging perpendicularl ,or turns over on its side; and to provi e an improved stop bar device arranged with ref-..

erence to the sheave or main pin of the head. The invention also contemplates certain novel details of construction, combination and arrangement 'of the improved appa ratus, whereby certain important advantages are attained,'as will be more fully described hereinafter, and pointed out in the claims.

'. casing;

These, together with such other objects and advantages as are incident to my lnvention, I attain by means of a construction illustrated in preferred form in the accompanying drawings, wherein' Figures 1 and 2 are-respectively side and rear elevations of abucket embodyingthe improvements; i

Fig. 3 represents a side eleva t om of the improved bucket in its open posltion;

Figs. At, 5 and 6 are enlarged detailed.

views of the main lever arm and itsflsheave Fig. 7 represents a slightly enlarged view D in rear elevation of the head and upper por- ,tions of the corner bars of the bucket;

' Fig. 8 is a vertical section view of the head taken along the lines VIIIVIII of Fig. 7-; and

Fig. 9 is a top plan view of the head in fieferring to the drawings, the reference numerals 10, 10, denote apair of clam-shell.

Scoops hingedly connected together by the Specification of Letters Patent.

Patented July 20, 1920.

Application filed October 19, 1918. Serial No. 258,843.

hinge pin .11. They are supported from the head block A by two pairs of corner bars 12, 12, and 13,13, which are pivoted at their lower ends to the outer corners of the scoops The upper end portions of corner bars 12 are riveted to the by the corner pins 14, 15.

head plates 17 of the headblock A, as indicated at 16, and extending centrally through these plates and the upper hubbed ends of rigid and compact he'ad block structure, and

one that furthermore materiallyreduces the number of hoisting sheave bearings ordinarily required in buckets of this type to the single head pin shown. i

The reference numeral 23 designates a rope collar for the hold line 24,.and 25 and 2 6 respectively denote'a guide sheave and a guideroller for the hoisting line 27, the

members 23 and 26 being mounted upon the hold line pin 28, and the member 25 upon guide sheave pin 29 in such a manner as to receive between its side plates 27 the centralflange 26' of the guide roller, and thereby hold the hoistline against slippage and prevent frictional contact thereof with any rigid head part should the bucket be canted.

These members and their pins are preferably positioned intermediate the upper poitions of the head plates 17, as shown inv Figs. 7, 8 and 9, and above the open top of the segmental member 22', and through which opening the hoist line extends upwardly from the small head sheave 20 toward and'through the pass 30 formed by the anti-friction members 25 and 26. I

' This segmental plate member 'has its wall peripherally formed with slots 31 and 32 for the passage of the hoist line to the shea-ve 40 of the lever. arm B, which is in the bight of the line, and is provided with other slots, 33. and 34, the line passing through the former slot 33 after leaving the large head sheave 19, and. has its end terminally secured at 3.5 to the short arm 36 f a bell crank lever, the long arm ofwhich 1s Q indicated by the reference numeral 37. This lever is pivotally mounted on the. bucket hinge pin 11, and at its free end is provided with a stop bar comprising the pivotally connected short-and long links; 38, 39, re-

- spectively, said stop bar at 41 to the lever arm 3 (Big. 7).

pivoted terminally and at its upper and other end to the head pin 18 after passing through the slot 34 of the head block These slots are elongated sufliciently'to permit the free working of the hoist line and stop bar between the closed position of the bucket (Fig. 1) and its open position (Fig. 3) the stop bar construction serving to efi'ectually brake the bucket scoops as they approach their full open po-' "sitions, and particularly'so in view of the fact that it is centrally pivoted on the. head pin, thus providing a well-balanced, durable and dependable structure.

1 Referring now more particularly to Figs.

2, 4,5 and 6, it will be Seen that the main I provided on said sections.

' or otherwise secured to the hinge lever consists of a'pair of spaced arm members 42 provided with hubs 43 pinned 11intermediate the pairs of rners ars, and having extensions 42' secured centrally to the back of one of the scoops. At the upper or outer-end of these members 42 is a secis mounted for rotation in the upper ends of I This. is one of the advantageous features of the arms 42. It will be noted that the casing. is slotted peripherally with up er and lower elongated slots 49, 50 (Fig. 5; for the free passage of the hoist line 27 during movement of the main lever B on the hinge pin 11, and also that it is crooked or bent in the manner shown in Figs. 2 and 4, so as to bring the sheave 40 in the requisite and pro rplane and thereby give straight line lea s from the sheaves in the head block A.

my invention, and which, with the head block construction described, 0 rates to confer longevity upon the line an efiects an increase in the efiiciency and durability of the bucket. Furthermore, a I noteworthy measure of protection is afiorded to the lever arm .sheave by reason of its being housed in the casing, and should any. small particles of material work through the narrow slots, 49, 50, a drain opening 51 is provided in the basal portion of housing'section 44 for their discharge when the lever arm is in movement toward its raised or closed position. As the sheave turns during this movement it .tends to scour out any particles that may have collected in the casing, and which are thereby forced out through the drain opening 51 in the direction indicated by the arrow in Fig. 5. In other words, I' provide aself-clearing protective covering for the lever arm sheave, and one which is especially eflicacious where the bucket is working.

under water. This represents another important feature of the invention.

'As will be seen from an inspection of the drawings, the bell-crank or auxiliary lever arm is mountedto oscillate on the hinge pin 11 in the space between the arms 42 of the main closing lever, and-the hoist or closing cable'27 extends from the arm 36 over the large head sheave 19 to the lever arm sheave 40, andfrom thence under the small head sheave 2O upwardly past the anti-friction guard'members-25 and 26. When the bucket is in its open position a pull exerted on the line will close the scoops, and with the hold me line will permit the opening of the scoops.

held taut .a slackening of the closing In order to prevent the slackened line from slipping oif the small head sheave 20, I provide a stud 52 in juxtaposition, therewith and whoseends are carried in the plates 17 During the opening movement of the scoops, the bell-crank or auxiliary lever and stop bar act together as a shock-absorber, as

I have previously indicated, the lever-turning on the hinge pin until the stop bar assumes the vertical position shown in Fig. 3. The result is that the arm 36 describes a short are at an accelerated rate of speed as compared with that of the main lever B, and

the opening movement of the scoops is gradually checked through the closing cable, the articulation of the stop bar being such as to minimize strain onbucket parts during this .movement. v and stop bar cocperate with the closing or Moreover, the auxiliary lever main lever in. the closing operation of the bucket and thereby attain the maximum closing effect fromv the pull in the closing cable m a very facile manner, the stop bar assumingits various operative positions during bucket actuation without any interference whatever with any other moving fpart rom .of the bucket. And it will be obvious,

the foregoing description, that the line not only has straight leads between sheaves, but is, moreover, guided against and guarded from frictional contact with fixed arts, and i as so guided and guarded itis he d against slip age'or anytendency whatever to jump of! t e sheaves about which it isreeved. The entire construction is simple, strong and efiicient, and these characteristics are particularly presentin the head block wherein the main head 18, upon which the head sheavesand stop bar turn, passes through use those corner bars 12 which at one side of the bucket are firmly riveted to the head plates and turns in those bars. It is pinned at 53 to the other pair of corner bars 13, so that the latter with the head pin provide a like measure of rigidity at the other side of the bucket.

What I claim is: p 1. In a bucket, the combination of a pair of pivoted scoops provided with a pair of corner bars at each side of the bucket, and a head block comprising side plates rigidly secured to one pair of said corner bars, and a pivot pin extending through said plates to receive the ends of both pairs of corner bars, said pin being rigidly connected with the ends of the other pair of corner bars and adapted to turn in the ends of the first mentioned pair of corner bars.

2. In a bucket, the combination of a pair of pivoted scoops provided with a pair of.

corner bars at each side of the bucket, and a head block comprising side plates rigidly secured to one pair of said corner bars, a pivot pin extending through said plates to receive the ends of both pairs of corner bars,

said pin being rigidly connected with the ends of the other pair of corner bars and adapted to turn in the ends of the first mentioned pair of corner bars, sheaves on said pivot pin, and a housing for said sheaves mounted intermediately of andon said side plates. v

3. In a bucket, the combinationof a pair of pivot'edscoops provided with a pair of corner bars at" each side of the bucket, and a head block comprising side plates rigidly secured to one pair of said corner bars, a

pivot pin extending through said plates to receive the ends of both pairs of corner bars, said pin being rigidly connected with the ends of the other pair of corner bars and adapted to turn in the ends of the first mentioned pair of corner bars, sheaves on said pivot pin, a housing for said sheaves mounted intermediately of and on said side plates,

and a hoisting lever for the scoops having a hoist line reeved about said sheaves, said housing being slotted to permit the passage of the line during'opening and closing movement of the bucket.

4. In a bucket, the combination of a head block, a pivot pin in said block, a pair of pivoted scoops, an auxiliary lever mounted on the scoop pivot, and a stop bar attached at one end to the auxiliary lever and at the other end to the pivot pin in the block.

5. In a bucket, the combination of a pair of pivoted scoops provided with supporting corner members, bucket closing means including a closing line and a pair of sheave members, an auxiliary lever provided with a stop bar member, and a bucket head for the scoops comprising a block provided with a head pin common to and positioned to re- .members, an auxiliary lever provided with a stop bar member, and a bucket head for the ceive all of said members, part of said mem bers rigidly secured to said pin and another part thereof adapted to turn on said pin.

6. In a bucket, the combination of a pair of pivoted scoops provided with supporting corner members, bucket closing means including a closing line and a pair of sheave said block including a housing disposed about said head pin and provided with openings for the closing line and said stop bar member.

7. In an excavating bucket, the combination of a pair of pivoted scoops provided 5 with a hingeelement and supporting corner members, a head block for said members, bucket closing means including a main closing lever and a closing line running through said block, an auxiliary lever mounted on said hinge element and having a stop bar member, said block including a head pin common to said members and a housing provided with slotted openings for the passage of the closing line and said stop bar, part of said members rigidly secured to said pin and another part thereof adapted to turn on said pin, and said auxiliary lever terminally connected with said closing line.

8. In a bucket, the combination of a head block, a pivot pin in said block, a pair pf" pivoted scoops, a bell crank lever mounted on the scoop pivot, and a stop bar attached at one end to the bell crank lever and at the other end to the pivot pin in the block.

9 In combination, a bucket closing lever arm provided with a sheave housing and a sheave rotatively mounted therein, the lower wall of said housing below said sheave apertured to provide a discharge passage for the discharge of foreign matter forced theretoward by said sheave.

10. In combination, a bucket closing lever arm provided with a sheave and a two-part housing for said sheave, a line reeved on said sheave, one part of said housing formed integrally with the arm and the other part being detachable, and a pivot pin having end bearings in both parts, said housing peripherally slotted for the passage of the drainage opening below said' sheave adapted to drain when the bucket is closed and serving to protect the under side of the sheave when the bucket is open.

7 12. In a bucket, the combination of a head block, a main pivot pin in the block, operating sheaves on the pin, an operating cable reeved on said sheaves, and a guide sheave and a guide roller for the cable pivoted on separate pins in the head blockabove'the main pivot pin, the guide sheave and the guide roller arranged so that'the guide sheave receives the roller between its side. plates.

13. In a bucket, the Combination of a pair of pivoted scoops provided with-a pair of corner bars at each side of the bucket, and a headblockrigidly secured to one pair of said corner bars, and a pivot pin in the head block adapted to receive the ends of both pairs of corner bars, said pin being ri 'dly' connected with the other pair of corner ars. 1 14.111 abucket, thecombination of a pair of pivoted scoops, a head block, a pivot pin in theh'ead block, a pair oi corner bars for one scoop rigidl secured tothe head block to form a rigi supporting frame for its scoop, and'a pair of corner bars for the other scoop rigidly secured to the pivot pin to form a rigid supporting frame for its scoop, the frame including the head block pivoting on the frame includin the in.

,WILLIAM M. V NA LE. 

